fix conv_conv fusion error in conv_dw+conv_1x1 (#4446)

* fix conv_conv fusion error in conv_dw+conv_1x1. test=develop

* test=develop

* fix format. test=develop

lite/core/mir/fusion/conv_conv_fuse_pass.cc

@@ -27,7 +27,7 @@ namespace mir {
 void ConvConvFusePass::Apply(const std::unique_ptr<SSAGraph>& graph) {
   // initialze fuser params
   std::vector<bool> conv_has_bias_cases{true, false};
-  std::vector<std::string> conv_type_cases{"conv2d", "depthwise_conv2d"};
+  std::vector<std::string> conv_type_cases{"conv2d"};
   bool has_int8 = false;
   bool has_weight_quant = false;
   for (auto& place : graph->valid_places()) {

lite/core/mir/fusion/conv_conv_fuser.cc

@@ -132,8 +132,8 @@ void ConvConvFuser::BuildPattern() {
               VLOG(5) << "The kernel size of the second conv must be 1x1";
               continue;
             }
-            if (groups1 != 1) {
-              VLOG(5) << "The groups of weight1_dim must be 1";
+            if (groups0 != 1 || groups1 != 1) {
+              VLOG(5) << "The all groups of weight_dim must be 1";
               continue;
             }
             if (ch_out_0 != ch_in_1) {